Specifications: Single/double sided yellow lens flashing light with yellow base -65-75 flashes per minute (can be adjusted if required at production stage) -xenon tube inside 1.5 j, diameter lens 200mm. -automatic on when dim, off during sunlight, with switch for always off or always on function -available in any lens color -base available in any color. -supplied with plastic key bolt to secure battery compartment (multi key opening tool provided 1 per a pair of lamps) -metal hangers/fixing brackets are not supplied as standard. -works with 6v4r25 batteries -manufactured to european standard